Automobile jack



F. L. SHIRE AUTOMOBILE JACK Filed Ooij.. 10, 1930 Oct. 3, 1933.

FILMS; 3..... 1.......uhwh5rhLd n vjected andcollapsed solely by the'rotation of the Patented oct. s, A1933 Forrest Y Il.

n My invention relates` to automobile :jacks having a plurality of 'threaded lifting members'telescopically arranged.Y

One of the objects-of myinvention is to pro- Vide a jack of the above character which can be Vmade to sell at avery .-low cost, which `is'simple in construction .and arrangement and in operation of parts;` in which thefoperatin'g parts `are Y substantiallydirt andwater,` proof and wherein Vthe load-carrying member. is automatically eprodriving means, and withoutv the'interventio'n of the load or other means, so that the loadi-carry- -ing member can ibe positivelyraised to'its full "height, or collapsed therefrom without the neces? sity of contactingwith the. load or `holdingthe .loadf-carryingrmember' by the hand. i

Y These and other objects of my invention will be apparent from a perusal of .the "following specification, vwhen-takenri'n connection with the accompanying drawing wherein:

Figure l isla position; 'Y

Figure 2 is. a'corresponding yview of the jack with the load lifting member partly elevated;

Figure 3 is a View of both lifting members elevated, and A Figure 4 is a section on line 4-4 of Figure l. Referring now tothe drawing in detail, my jack comprises'a housing 2 of preferably cylindrical construction upstanding fromA a base 4, which forms a relatively broad support for the jack.

-The housing 2,k at a pointl considerably above theY base, is provided with an outstandingcylindrical ange or lip 6,'adapted to receive an upper housging 8 enclosing. thedrivinggear, as will be hereinafterdescribed.v The innerportion of the housing is of tubular formation, and the innerwall A.ofthe housingf2is providedrwith a continuous thread 10 v,extending approximately.from'rthezbase 4 of the housing'to the top .wall 12rthereof. Rotatably mounted on the top wall -l2.of this housing is a driving member inthe formfofrabevel gear 14, which,tas`fsho'wn in Figure` 1, is provided with a key 16 slidablytting ina groove 18=of a cylindricalsleeve 2.0, thereby providing a sliding v spline sothatzthe bevel gear 14, inrotating, will alsorotaterthesleevef2, but vwill permit the sleeve' .to slide vertically through the bevel gear 141 Y Slidingly mounted within the sleeve ,-20- is a second sleeve 22, which at its upper/.end is pro- .vided with a arlged closing cap 24 anda spacing t washerV 26.- `The c ap 24 is provided with an aperture 28, inwhichis swivelly mounted the load 4carrying head 30, v so that this head() Vis freefto v,driven or rotated, while'permttinglsuch sleeve view ofmy jack in collapsible' 36, which is rigidly and integrally fastened with- I interiorjthreads `38,.which are `adapted to mesh vinto correspondingly formed-threads (l0 ,on acomand screw 42 threads on the nut- Suitable means is provided ,with a4 neck-passing through thev aper- Y ture. 28, and on` its lower portion this 4neel: isfformed withY an enlargedshoulder 32, so as to hold the load-carrying head in positionl onv the Cap 2,4450

sleeVes,-and as shown in.1igure 4,fare preferably formed on diametrically opposite portions joifj` the sleeves. By means of these splines thegvbevel gear i4 is adapted to also rotate the sleeve 22,;while gear-"14, and .the spline between the sleeve-Amand the lsleeve 22 permitsthe latterQsleeveZZ to be 22 .to slide vertically V with respect tofthe s leeve` .2 0. v The bottom portion' of sleeve 2 2 is :provided on itsinner wall witha hollow, cylindrical nut inthe sleeve'22 ,fand this nut'' is provided with bined screw and nut, whichfi's formed ,as a` rela? tively long .threaded `s crew bar 42.,havingatits bottom a'nut portion 48 of larger diameter-L The ,'nut `44 is Siixed-to the-screw`421by means of the fastening pin ,46er .otherrmeana'so that nut144 are virtually one piece and move togethen, rl"l1e' th'reads 40` ofthe screw portion 42 are identicallyerranged with' respect tothe stop pinj50 which strikes the` i 1ppe r,f edge`= of the 4nut 36 of the hollow sleeve 2 2 to thereby limit '100 the,` upward travel of said sleeve. f

,l f The top and bottom portions-of sleeve. 2il are formed V,withsuitable'*stops to engage they vupper Vvand `lower edges of the` rbevelgea1' 14, whereby `to limit the upper and lower travel positions of 1105 thissleeve20. provided fordriving the bevel gear, 14, and `this-,comprises the smaller bevel gear 5 2, mounted alateral bearing vformedign he upper housing 8-.1 Thegouter end O f thisvbeyel '1,10

fit1

it sleevev20. vBoththe-spline portions 34 and 1,8;.are Y Aformed as inwardly bentvportionsof these tubular permitting thesleeve 20 tol slide through the -bevel portion` 48 .1n other words, the threads v40.0f the screw portion 4 2 are ,rightgear 52 is provided with a suitable opening 54 for receiving a turning instrument such as a crank. The housing 8 may be of pressed or sheet Y steel or cast metal, and may be formed in two halves to t about the upper portion of the housing 2and the bevel gear 14, and such halves may befsuitably. moulded or Welded together to form an enclosing housing aboutthe bevel gears 14 and 52. The uppervportions of the housing 8 are open so that the sleeves 20 and 22 may slide vertically therethrough. The lower por'- tions of the housing 8 are provided with flanges 56 which rest on the outstanding lip 6^formed in',` the housing 2. The bottom o f,.the.'housing 2 is. 15 preferably closed by a plate toexclude-.dust andV dirt, and this plate in some instances may beV arranged as an integral part ,of` the base, and has the function of a stop member'toA limitthe down-V .wardA movement of the nut 44.

' 1t willrbe noted that the screw ingr. sleeve 22,thel`connecting sleeve 20,3and-th'e thn'eaded housing 2'a1"e'Y all arranged to mutually" `telescope,"and are-vprovided---vwith threadedv and splinedfconnections to: permit the Vprojection of the housing 2,-thef members 22'and 42-beingar" Vranged vtoproedtlth'eiloadecarryinghead 30 to bfftheehosing'l y 531) -"=It"wi1l bef-*also apparent lthat by forming-the l5.1leeve522 as :ifV cylindricallfnrember; and by`pro' the-sleeve'() as af'cylindricalmember and ythe lhousing-2 as* an enclosinghousing,Vv theV op`-l A l eratingportions Vof the jackfare-wholly enclosed, 'and -prfverittheiing-ress of dust-dirt v`and water.

f-'i"5It will be apparent also that the sleeve -204 performs a' further function. as ,a splined connection *between the bevel vgear 14; which" rotates but 'can'- `Inot be` elevated, and thei lifting sleeve 422, which 146 {must bel-ifted toa height considerably above the top off-the Byreason of the splined connection between the bevel' gear 14,'the sleeve 20, "and ^thejlifting sleeve 22, and by reason of the'thr'eaded connectionsbetween the housing 2,

' "'45 the nut' 48,*and between the lifting Vsleeve 22 and thescr'ew ,42, vand the splined connection between "the lifting-sleeve 22- and -the spline sleeve, 20, it willalsoybeapparent*that the' lifting elements are 'positively -'projected Tand" retracted upon the operation yofthe vjack, so that the' raising and low.-

jering of the load-carryinghead 30 is, at all times under thedirectfand `positivecontrol"of the operator, `that is to; say, the' loadcarrying head 30 may be projected to its maximum projection'sim- 'ply'by rotating-the member 50.

In the voperation of my jack, upon the prota- 'tion lofthe bevehgear v,14 the sleeve 20 will like- :wise be*rotated,'A 'andjalso Vthefsleevef22 will be rotated, and by reason ofjthe'vthreadedtengage- '360 `:sentarme mut portion ofthe sleeve 22-w1th "thesc'rew'bar' 42; and by reason of the; engagement of the-threads on thenut portion 44 ofthe screw bar 42 with the'internal threads 10 of the fhousingfthe-sleeve' 22"will begprojected first.

"765 -This sfdue to theffa'ct that `Atheifrictional resistance between Vthe nut 36" andthe 4threads of the/screw bar 42 'is less `than 'theI` frictionalVA re-v sistancebetween the'threadsi andthe threads i0 or the housing.

When-the sleeve 22'hasgone`so far that the upper surface of the nut 36 hits the stopv 5 0-, then serve to cause Vthevnut 44 to lmove Valong 'the 42, the K lift-f `top` drive iacle,` wherein: the "lifting elements 'a 1.,-A lifting jack for .said driving member andfthreaded connections between said 'internally' vthreaded base. :andr lone of" said lifting members, whereby 'said vmembers are-automatically andV successively elevated,` one 4ously rotatedrin one direction, andmeans forro- ",tatng said driving member. i the'sleeve 22will ber no 4furtherelevated `with `jnally f threaded standard,4 a,A driving memberroftatably fass'o'eiated @with` saidv standard, aipair *of screw threaded lifting members telescopically15G v.44 and the screw bar 42 will then begin to descend until `the jack has reached vthe collapsed positionshown in Figure 1.

Fronrthe foregoing-*it will be evident that I haveproduced a very compactlyarranged and .economically constructed jack, in which, by reason of the splined connections between thelro- V'tatable driving member, the sliding sleeves, Athe threaded'members and the base, va positive elevation and depression of vthe two lifting members .isfautomatically i accomplished; f

eFurthermorq by reason ofthe: sleexzeflike construction of the lifting members andnthe :splined ysleeve 20, and byir'eason ofthe"enclosingiemetal ofthe base `and the'housing memberxienclosing fico '.thepgearsfethe dust,Y dirtxand moisture is'. -ex- -cluded from the operating; parts otthejack.,A A

an;elevationisubstantially threetimesthe'height v 1 f tube-like `arrangement vof :the'lifting members,

It'will alsov be 'apparentlthatfby reason ofgthe constructed, so-.that a- 'iaclr Vof prlightf weight,

greater `durability and i economy of construction is'produced. l 1 E f Another important-featureofrmy invention'A resides in'the; fact that'Ihave provdediaso-.called i' have theirithreaded surfacestenclosed andzeX- lcludedfromv dirt', grease, moisture, :and -thelike Having thus A:described myxiinventiomwhat .I "claimxas new and-idersirefto secure ,by'Letters Pati115 entis:V y Y Y automobiles zand -the like, comprising a vertically disposed base, a'z'driving Ymember rotatablysupported uponY thebase, a

plurality vof 'sleeves `nested :itheidriving 1120 -member fand splinedrithereto a for rotation vwith the driving member, but capable of slidingmove- `rnent'through the driving member, a load-car- -ryng+head on one of saidsleeves,and'athreaded velement having a" portion threadedly iconnecterl z with one ofsaid tubes andK an externallythreadedportioni 'threaded with xthe ibase, whereby; .on

'rotationltoi theY driving. niernbenzy said .load-.barry- `ing headwill bevprojected from"thefbase,v

25A-jack for automobiles comprising'a hollow, internally threaded supporting vbase, fa'4 rotatable driving member 'associated with said-base; two threadedlyfi interconnected *projectable lifting members `nested within'v said 'driving member and capable of,I`- movement c.tlfierethrc'zughgA Ione of said v-members being a bar :and -the other 'being a -sleeve, .a load-supporting :head carried byfone l off: saidfmembers', and splined :connectionsbetween atfleastione of saidliftingtr'nembersand at aftime, when the driving member is continu- SKA-"lifting `jack comprisinghollow interassociated with respect to each other and within said driving member, one of said lifting members having a load-carrying head, and splined connections between said driving member and one of said lifting members, there being threaded connections betweenthe other lifting'member and said hollow, internally threaded base, whereby to cause the automatic'projection of said lifting members upon the operation of said driving member.

4. A lifting jack comprising a hollow standard, a driving member rotatably associated with said standard, a pair of telescopically associated, threaded members, said members being telescopically associated with respect to said driving member, one of said threaded members having a load-carrying head at its upper end and the other having an externally threaded portion at its lower end, splined connections between said driving member and the load carrying member, and a threaded connection between said base and the externally threaded portion of the other lifting member, and means for rotating said driving member.

5. In a lifting jack, the combination of a hollow base, a rotatable driving member associated therewith, two lifting members telescopically associated with each other and ywithin said driving member, one of said lifting members having a load-carrying lead, means associated with the driving member for rotating one of said lifting members, the other lifting member being operatively associated with the first lifting member and having an externally threaded portion operatively associated with the base for causing the automatic and successive projection of said lifting members on rotation of the driving member.

6. In a lifting jack, a hollow standard having internal screw threads, a lifting member mounted in a standard and having external threads engaging the threads of the said standard, .said member havingan elongated, externally threaded portion, a load carrying member having threaded engagement with the threads of the elongated portion, and a driving member rotatably associated with the standard and connection between said driving member and said load-carrying member to rotate the latter for causing the successive projection of the lifting members on rotation of the driving member.

'7. In a lifting jack, a hollow standard having internal threads, a lifting member having external threads engaging those of the standard, said lifting member having an elongated, threaded portion, `a load-carrying member having threads engaging the elongated threaded vportion, and means carried by the standard for rotating the load-carrying member while permitting it to shift axially with respect to the standard.

8. In a jack, the combination of three threadedly interconnected members, two of said members being constructed and arranged to collapse within the third member and to be projected from the' third member and from each other, one of said members having a load-carrying head, another member having a portion of enlarged diameter threaded with the base` and an upwardly extending portion of ,lesser diameter threading `with the load carrying member, a rotatable driving member and a splined connection from said driving member to the load-carryingr member.

9. An automobile-jack comprising the combination of a hollow, upstanding housing having a threaded bore, a rotatable driving member mounted on the rtop of said housing, a sleeve having a sliding splined connection with said Vrotatable driving member, a second sleeve having a slidingsplined connection with said first sleeve, said second sleeve having a load-carrying member at its top, and having an internally threaded nut at its bottom, and a screw member having an enlarged head at'itsbottom portion, with the thread of the enlarged head having the same direction as thethreads yof the screw, the

`thread of the screw engaging the thread of the nut of thesecond sleeve member, and the-thread of the enlarged portion of the screw engaging the thread of the housing,'and means for rotating the driving member for causing the automatic VIV member while permitting it to be shifted axially V with respect to the standard.

l1. In a lifting jack, a hollow standard providing an internally threaded cylindricalchannel, a lifting member comprising a diskof relatively large diameter and having external threads engaging the internal threads of the standard, and an externally threaded shaft mounted onand extending upwardly of the disk, said externally threaded shaft being of lesser diameter than the disk, a load-carrying member telescoping with and threadedly connected to said externally threaded shaft and means carried by the upper endof the standard for rotation with the loadcarrying member while permitting it to shift axially with Vrespect to the standard.

FORREST L. SHIRE. 

